# Why do noble gases like Xe and Kr form compounds, despite offending the octet rule?

According to the octet rule noble gases should not form compounds but xenon and krypton form compounds like $\ce{XeF2}$, $\ce{XeF4}$, $\ce{XeOF2}$ and $\ce{KrF2}$ respectively. Why?

• This question and its answers should apply to your question. It's a slightly different context but the idea is the same: the octet rule is rather useless beyond Period 2. – orthocresol Oct 17 '15 at 15:04
• Basically, the octet rule only applies to a very specific subset of possible compounds. In general, there is no octet rule. – bon Oct 17 '15 at 15:06
• Nobody told Xe or Kr that they had to follow the octet rule (which is more of a rough guide than a rule). Chemistry has many 'rules' that only apply in limited circumstances. Don't blindly apply rules. – Jon Custer Oct 17 '15 at 15:50
• See my answer to the question ortho linked to learn more about the octet rule. Also, all compounds (e.g. $\ce{XeF2, KrF2}$) with noble gases are conforming with the octet rule if applied correctly. – Jan Oct 17 '15 at 18:05